A free program for Android, by RAFAEL MATTOS.
Screen Calibration is a handy utility that will help you fix some of the most common display problems. It's easy to use and will give you a brand-new screen in no time.
The application has a built-in database with information on how to solve each of the problems that may occur. It will provide you with all the information you need to know in order to fix your display.
The first thing we need to say about this application is that it is free. There are no hidden fees and no in-app purchases. You will not have to pay a penny to use it.
